Know all about Chalk and Mylonite properties here. All properties of rocks are important as they define the type of rock and its application. Chalk belongs to Sedimentary Rocks while Mylonite belongs to Metamorphic Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Mylonite is Foliated. Chalk appears Soft and Mylonite appears Dull, Banded and Foilated. The luster of Chalk is dull while that of Mylonite is shiny. Chalk is available in grey, white, yellow colors whereas Mylonite is available in black to grey colors. The commercial uses of Chalk are alumina refineries, creating artwork, drawing on blackboards, gymnasts, athletes and mountain climbers use for grip, in aquifers, paper industry, production of lime, raw material for manufacture of quicklime, slaked lime, soil conditioner, whiting, whiting material in toothpaste, paint and paper and that of Mylonite are creating artwork, gemstone, jewelry.